Work

On problems in the definition of the International Temperature Scale arising from the variability of the isotopic composition of some substances used for the fixed-points

Year: 2005

Type: article

Abstract: The definition of the International Temperature Scale, ITS-90, requires the substances used for the realization of the fixed-points, except 3 He, to be of 'natural' isotopic composition. The uncertainty of the best fixed-point realizations for some of these substances is today significantly affected by the natural variability of the isotopic composition of the available samples. The paper discusses the main implications of this problem, which is becoming an obstacle to further improvements for some of the fixed-point realizations. In addition, the two main solutions are compared: (i) to define only a reference composition and (ii) to define a reference composition and allow the use of a correction for the deviations from a reference composition.

Source: Metrologia

DOI: 10.1088/0026-1394/42/4/002

Author: F Pavese

Institutions: Istituto Nazionale di Ricerca Metrologica, National Research Council

Language: English

Topic: Scientific Measurement and Uncertainty Evaluation

Subfield: Statistics, Probability and Uncertainty

Field: Decision Sciences

Domain: Social Sciences

Open Access status: bronze

OpenAlex ID: W2037516660

FWCI: 2.313

Cites: 20

Cited by: 13

Related to: 10